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Nonprofit group Mars One is beginning to recruit people to colonize the red planet. The biggest concern, at this point, is how children would fare in the colony. Doctors are unsure whether women can give birth in a low gravity atmosphere and how radiation would affect children. "We definitely will start out at first with animals and see how the pregnancy works with animals," said Norbert Kraft, chief medical officer for Mars One.

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A horned dinosaur that lived 79 million years ago is helping researchers better understand how such creatures evolved, scientists say. The head of Wendiceratops pinhornensis featured a pair of horns above its eyes and one on its nose, with hook-like hornlets along its frill, and scientists say the head structure is a key evolutionary area. "That's where all the evolution is happening in these animals," said Michael Ryan, co-author of the study published in PLOS ONE.

A Dutch company with a bold plan to put a colony of humans on Mars within the next decade is facing the prospect of delaying the mission as the deadline nears for its first unmanned flight to the red planet. Mars One, which is working in concert with Lockheed Martin and U.K. firm Surrey Satellite Technology on the mission -- with the goal of producing a reality TV show on the colony -- is scheduled to send a probe to Mars in 2018, but may be forced to delay the launch until 2020.

Mars One, a nonprofit that plans to put four astronaut colonists on Mars, has agreed to use a map of the red planet being created by science-funding firm Uwingu to help the settlers find their way around their new home. Uwingu is charging people a few dollars each to name the 500,000 nameless craters and other topographical features on Mars. "Our map's actually going to get used on Mars. Anyone who contributes to it will know that their name -- the name that they put down -- is going to Mars," said Alan Stern, founder and CEO of Uwingu.

Mars One foundation and Lockheed Martin Space Systems and Surrey Satellite Technology Ltd. have signed a deal to create a study of a privately run robotic Mars mission that could pave the way for an eventual human colony on the Red Planet. Mars One wants to send the robots in 2018. "We're very excited to have contracted Lockheed Martin and SSTL for our first mission to Mars," Mars One co-founder and CEO Bas Lansdorp. "These will be the first private spacecraft to Mars and their successful arrival and operation will be a historic accomplishment."

More than 100,000 people have answered Dutch nonprofit Mars One's call to colonize the Red Planet. Applicants paid $38 each for a chance to be part of a four-person team that would head to Mars in 2022 for the mission, which is expected to cost $6 billion.